II Samuel 12:4, 7

And a traveler came to the rich man, who refused to take from his own flock and from his own herd to prepare one for the wayfaring man who had come to him; but he took the poor man’s lamb and prepared it for the man who had come to him.”

Then Nathan said to David, “You are the man! Thus says the LORD God of Israel: ‘I anointed you king over Israel, and I delivered you from the hand of Saul.